File manipulations in C

Question

I am using a simple 'C' code to do the following:

1) Read from a .txt file.

2) Based on the string present in the .txt file, a directory will be created.

I am not able to perform step-2, as I am not clear with type conversions.

Here is my code:

#include <stdio.h>
#include <stdlib.h>
#include <direct.h>

int main()
{
   char ch, file_name[25];
   FILE *fp;

   //printf("Enter the name of file you wish to see\n");
   //gets(file_name);

   fp = fopen("input.txt","r"); // read mode

   if( fp == NULL )
    {
      perror("Error while opening the file.\n");
      exit(EXIT_FAILURE);
    }

   printf("The contents of %s file are :\n", file_name);

   while( ( ch = fgetc(fp) ) != EOF )
      printf("%c",ch);

    if( _mkdir(ch ) == 0 )
   {
      printf( "Directory successfully created\n" );
      printf("\n");
   }
   fclose(fp);
   return 0;
}

Here is the error:

 *error #2140: Type error in argument 1 to '_mkdir'; expected 'const char *' but found 'char'.*

Answer 1

YES, compiler is right.

You are passing a char c to _mkdir, instead of a string.

You should read the string from file and store it to file_name (I guess you forget) and then

_mkdir(file_name);

See below:

#include <stdio.h>
#include <stdlib.h>
#include <direct.h>


int main()
{
    char file_name[25];
    FILE *fp;

    fp = fopen("input.txt", "r"); // read mode

    if (fp == NULL)
    {
        perror("Error while opening the file.\n");
        exit(EXIT_FAILURE);
    }

    fgets(file_name, 25, fp);

    _mkdir(file_name);

    fclose(fp);
    return 0;
}